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Note 16 - Employee Benefit Plans - Asset Allocation (Details)	Jun. 30, 2023	Jun. 30, 2022
UNITED STATES
Asset allocations	100.00%	100.00%
Foreign Plan [Member]
Asset allocations	100.00%	100.00%
Equity Securities [Member] \| UNITED STATES
Asset allocations	35.00%	33.00%
Equity Securities [Member] \| Foreign Plan [Member]
Asset allocations	0.00%	6.00%
Debt Securities [Member] \| UNITED STATES
Asset allocations	44.00%	48.00%
Debt Securities [Member] \| Foreign Plan [Member]
Asset allocations	67.00%	78.00%
Hedge Funds, Global Opportunity [Member] \| UNITED STATES
Asset allocations	12.00%	11.00%
Hedge Funds, Global Opportunity [Member] \| Foreign Plan [Member]
Asset allocations	3.00%	15.00%
Other Debt Obligations [Member] \| UNITED STATES
Asset allocations	9.00%	8.00%
Other Debt Obligations [Member] \| Foreign Plan [Member]
Asset allocations	30.00%	1.00%